I work for a manufacturing company that has some older network devices that are affected by IP scans. The scans can knock out these devices and cause downtime, therefore, I can only perform the scans in the middle of the night when they've stopped production for the day. As things stand, it looks like I'll have to get up in the middle of the night to start the scans and then rely on a timed intervals to continue the scans at night. However, I'm concerned about the start time of the scans drifting using timed intervals. If they start to drift and end up scanning during production hours it will cause downtime.